Showing Spotlights 9 - 16 of 2368 in category All (newest first):
Any working electronic device is the source of electromagnetic (EM) radiation. Device miniaturization and a consequent increase in the heat and electromagnetic (EM) wave emission in the electronic systems make the simultaneous heat management and electromagnetic interference (EMI) shielding crucially important. New research shows that the extremely high thermal conductivity of graphene and good electrical conductivity, even without the energy band-gap, make graphene promising for EMI shielding and thermal management applications.
Sep 28th, 2020
Researchers have demonstrated the creation of a living micromotor with multifunctional capability. The distinctive feature of this device is that it doesn't require synthetic materials and therefore avoid the problems of energy consumption and waste production generated during material synthesis. Using microalgal Chlamydomonas reinhardtii cells as the sole material, the scientists made living and multifunctional micromotors controlled by optical force. This system might be particularly useful for indirect manipulation and controllable disruption of biological targets.
Sep 23rd, 2020
Imagine catching a comet. Now imagine the comet is as small as a few billionths of meters and it is made of elements from the periodic table that do not like each other; whose fate is that of separate in space and dissolve in biological environments or just in air. Before this happens, the elements are trapped in what is called a non-equilibrium alloy nanoparticle. Since this nanoalloy changes over time, it is not enough to provide its composition and size at a given time, but one should know also how it will change in the near future, or how it changed in the near past.
Sep 21st, 2020
Researchers have successfully produced durable antiviral surfaces that inactivate SARS-CoV-2 within 6 hours. In contrast, on various non-nanostructured surfaces or smooth surfaces, the SARS-COV-2 virus remained viable for up to 48 hours. These results provide evidence that surfaces that are structured with specific nanoscale surface features are effective in preventing SARS-CoV-2 and the subsequent environmental spread. Such nanostructured surfaces can be used in hospital environments and can be extended to other industrial sectors and public infrastructure such as transportation, where fomites or contaminated surfaces are carriers for viral infections.
Sep 18th, 2020
A major challenge for nanophotonics engineers is the wide range of optical responses that metamaterials and other nanoplasmonic structures can generate. In the past few years, machine learning has emerged as a powerful tool for sifting through this vast universe of possible design parameters to aid the design of nanophotonic devices tailored for specific applications. A novel approach uses a type of neural network called a mixture density network to solve the non-uniqueness problem of machine learning algorithms, while also improving accuracy.
Sep 17th, 2020
Skin-interfaced, wearable electronics have attracted significant attention due to their unique roles in preventative monitoring, diagnostic confirmation, and convenient therapeutic options. The ultimate application of these bio-integrated devices for practical and convenient applications hinges on the seamless integration of on-body sensors with wireless transmission modules. As a promising direction toward this class of integrated systems, soft body area sensor networks include on-body sensors for physiological signal monitoring and flexible printed circuit boards for signal conditioning/readout and wireless transmission.
Sep 15th, 2020
Researchers have provided an example of on-demand control of quantum phenomena to design the quantum materials. By state-of-the-art quantum mechanical simulations, they find that a two-dimensional transition-metal ditelluride, MoTe2, can realize a structural phase transition from the semiconducting phase to the topological phase triggered by photoexcitation of carriers alone. The sub-picosecond phase transition can be controlled by varying the laser wavelength. The research is inspired by the classical phase transition theory proposed by Lev Davidovich Landau and Rudolf Ernst Peierls.
Sep 14th, 2020
DNA is probably the most programmable biomaterial for creating a wide range of rationally designed and functionally enhanced nanostructures. The sophisticated, programmable, and addressable DNA nanostructures are strong candidates for constructing nanoelectronic devices. The size of DNA molecules is also key: DNA double-helix has a neighboring base pair distance of 0.34 nm and a diameter of 2.1 - 2.6 nm a, and thus DNA complex-based nanoelectronics may break the 5-nm processing limit of commercial silicon-based semiconductors.
Sep 10th, 2020